MITIGATION MEASURES FOR WHEAT PRODUCTION UNDER HEAT STRESS CONDITION
Journal Title: International Journal of Agricultural Science and Research (IJASR) - Year 2017, Vol 7, Issue 1
Abstract
Climate change is a reality and agriculture is highly vulnerable. The changing climate could strongly affect the wheat production worldwide. Among various factors affecting wheat productivity high temperature has a significant effect. The terminal heat stress is prevalent in the major wheat growing regions of Indo-Gangetic Plains. The increasing temperature shortens the duration of both vegetative and reproductive phases. The effect of increasing temperature during reproductive phase is more harmful than that of the vegetative phase. Selection of early maturing varieties escapes from heat stress and varieties having terminal heat stress tolerance can cope up with high temperature during the grain filling stage. Timely sowing of wheat crop is beneficial in mitigating heat stress as it gives higher yield than sowing the crop late in the season. Late sown wheat crop makes the ripening stage of the crop coinciding with high temperature stress. Late planting also causes reduction in the duration of tillering period and leads to forced maturity thus reducing the grain yield due to exposure to hot weather during the critical stage of crop growth that is the grain filling period. Planting technique of wheat that includes zero tillage, bed planting, conventional tillage with mulching and surface residue retention increases grain yield as compared to conventional tillage. Also provision of additional irrigation water at critical stages and skipping during the dough and ripening stages increases the yield of wheat under high temperature. Application of certain chemicals can help in mitigating the adverse impact of high temperature stress.
Authors and Affiliations
TWINKLE JENA, RAMESH KUMAR SINGH, MANOJ KUMAR SINGH
Keywords
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